Specialized Turbo Kenevo: Flaws and Issues Reported by Owners (Technical Analysis)
Specialized Turbo Kenevo: Flaws and Issues Reported by Owners (Technical Analysis)
The Specialized Turbo Kenevo is Specialized's enduro/park e-MTB, known for its aggressive frame and the use of Specialized/Brose mid-drive motors. Its high downhill performance and powerful uphill assistance (especially with the Brose 2.1 motor) make it an extreme bike, but the complexity of the electrical system has led to several problems reported by owners, particularly on first and second-generation models.
1. Recurring Problems with the Electrical System (Brose Motor)
The Brose S-Mag/Specialized 2.1 motor was the core of the first generations of the Kenevo (as well as the Turbo Levo) and represented the most critical point, especially for the 2019–2020 models.
Main Flaws of the Brose 2.1 Motor (2019–2020)
Drive Belt Failure: This was the most widespread issue. The failure of the internal rubber belt (which ensures the motor's quietness) leads to assistance blockage or complete failure. Specialized extended the motor warranty to 4 years for these models and implemented improvements (stronger belts) in subsequent models (from 2021).
Stuck/Noisy Freewheel: Malfunction of the internal freewheel, which can cause the cranks to spin backward when the rider stops pedaling or produce unusual noises. This problem, encountered especially in the first batches, may require specific maintenance or motor replacement under warranty.
Connectivity and Assistance
Intermittent Assistance Loss: Many first-generation Kenevo owners reported the motor suddenly stopping providing assistance while pedaling. This is often attributed to cabling issues—in particular, connection cables (including magnetic connectors) between the motor, battery, and display—which are sensitive to dirt, moisture, or corrosion, leading to poor contacts.
Official Battery Recall (First Generation)
Fire/Short Circuit Risk: On first-generation M1 batteries (Kenevo FSR 2018–2019), Specialized identified a risk of water ingress into the control board, with the potential risk of thermal runaway and fire. Specialized issued a global recall for the repair/replacement of the control panel. It is imperative to verify that the recall intervention has been performed on the used unit.
2. Issues Reported on Cycling Components
The extreme use of the Kenevo severely strains the non-electric components:
Accelerated Mechanical Component Wear: Due to the high motor torque and the aggressiveness of the terrain (heavy enduro and bike park use), the wear of tires, rims, and hub bearings is accelerated compared to non-assist MTBs. Owners often recommend installing inserts and reinforced-casing tires to prevent pinch flats and rim damage.
Suspension Maintenance: Kenevo bikes (with Fox or Öhlins suspension) require scrupulous maintenance. Given the e-bike's weight, it is crucial that the rear shocks and forks are serviced regularly. If a used Kenevo lacks suspension maintenance documentation, there is a risk of a significant, unexpected service cost.
3. Analysis of the "Quiet vs. Reliable" Motor
Early Kenevos (2018–2020) were praised for the quietness of the Brose 2.1 motor. However, the pursuit of silence, achieved through the internal belt, proved to be the main mechanical weakness that led to failures.
Technical Advice for Used Purchase:
2019–2020 Motor Verification: Request proof of motor replacement under warranty or confirmation from a Specialized dealer that the motor has the latest firmware update and hardware upgrades (reinforced belt).
Battery (Recall): It is essential to verify, using the serial code at an authorized dealer, that the unit is excluded from the fire risk recall or that the repair work has been completed.
4. Diagnostics and App Issues
The Kenevo relies on the proprietary Mission Control App and the TCU (Turbo Connect Unit) system.
Difficulty with Advanced Diagnostics: Unlike other systems, advanced diagnostics (such as the precise number of charge cycles and battery health) can only be read by the Specialized dealer using dedicated tools. This makes purchasing from private sellers less transparent regarding battery longevity compared to other brands.
Connectivity Issues: Some owners have reported pairing or disconnection problems between the handlebar remote (Mini Remote) and the control unit, often requiring firmware interventions at the service centre.